In situations where oxygen is scarce or absent, such as during prolonged diving or high-altitude mountaineering, or in 

cases where breathing becomes impossible due to toxic substances like in fires or chemical, biological, or radiological 

incidents, a device that supplies a specific amount of oxygen is necessary for survival. A Manganese Oxide/Spherical

Activated Carbon (Mn-SPAC) catalyst was produced for the purpose of creating a steady oxygen supply. This was 

achieved through the carbonization and activation of manganese-exchanged resin under nitrogen and steam conditions. 

The characteristics of Mn-SPAC were analyzed using pore characteristics analysis, XRD, FE-SEM, and XPS, focusing 

on the amount of added manganese and carbonization time. To optimize conditions for generating a consistent amount 

of oxygen, the synthesized catalyst was reacted with 30% hydrogen peroxide, and the amount of oxygen produced was 

measured. In the optimized reaction setup, a consistent oxygen release was monitored for a duration of 20 min during 

the decomposition of hydrogen peroxide. Comparative XPS studies conducted pre- and post-reaction demonstrated the 

oxidation state of manganese following the process. These observations indicate that the newly developed catalyst is best 

suited for one-time use scenarios.